My Obsession with Japanese thermoses

For a long time I've been living under the assumption that Japanese thermoses (tumblers, travel mugs, insulated drink bottles, vacuum flasks... whatever you call them) are the best. To test out my convictions, I added to my already large collection of thermoses to test out a whole bunch of them.

Because I know people will ask, here's a list of all the thermoses that I own that I could find. It's not exhaustive. Note 1: Some of the links are Amazon referral links, but don't feel any pressure to buy using those links. Note 2: Yen prices already include Japan's 10% consumption tax. I don't know how taxes work on Amazon US, but the $ prices are what I saw listed on the site. Note 3: If it's a Japanese bottle being sold in the US or vice versa, the prices are usually much more expensive.

Zojirushi Travel Mug Black 480ml ￥1,930 象印マホービン(ZOJIRUSHI) マグボトル 480ml ブラック SM-TA48-BA https://amzn.to/3arfhUx
Yeti Rambler 20oz tumbler $29.95 https://amzn.to/3iNcPL4
JP Kids Thermos straw bottle 400ml サーモス 真空断熱ストローボトル 0.4L ブルーネイビー FHL-402F BL-N ￥ 2,453 https://www.amazon.co.jp/gp/product/B07ZSHKMK5
JP Baby Thermos straw bottle 250m ml サーモス まほうびんのベビーストローマグ FHV-250B ライトイエロー 9ヶ月頃から ￥ 2,530 https://www.amazon.co.jp/gp/product/B079C3TZB6
Thermos Screw Top Tumbler 480ml Bronze サーモス 水筒 真空断熱ケータイタンブラー ブロンズ 480ml JOE-480 BZ ￥1,940 https://www.amazon.co.jp/gp/product/B07VCHC5GY
Thermos Screw Top with Cup 500ml Brown/Maroon サーモス 水筒 ステンレススリムボトル 500ml ブラウン FFM-500 BW ￥2,695 https://www.amazon.co.jp/gp/product/B00BB76JZQ
Thermos Stainless King 16-Ounce Travel Tumbler, Midnight Blue $20.71 https://amzn.to/349F7eF
Thermos Stainless King 40 Ounce Beverage Bottle, Midnight Blue $27.00 https://amzn.to/344KZWb
Thermos Stainless King Can Insulator with 360 Degree Drink Lid, Midnight Blue $16.59 https://amzn.to/2PYz0Bv
Tiger Travel Mug 500ml Black タイガー魔法瓶(TIGER) マグボトル ブラック 500ml タイガー 水筒 サハラ マグ MCX-A501-KL ￥1,820 https://amzn.to/3kKfZB3
Thermos Cycling Water Bottle 580ml サーモス 真空断熱ケータイマグ FJF-580 580ml ブラック(WBT06500) ￥3,765 https://www.amazon.co.jp/gp/product/B07WWT2RZJ
Thermos Travel Mug (One Touch on top) Black 450 ml サーモス 水筒 真空断熱ケータイマグ 【ワンタッチオープンタイプ】 450ml エスプレッソ JNS-451 ESP ￥2,260 https://amzn.to/31Q0EpO
Thermos Travel Mug (One Touch on front) Maroon 500ml ￥2,199 サーモス 水筒 真空断熱ケータイマグ 【ワンタッチオープンタイプ】 500ml ワインレッド JNR-500 WNR https://www.amazon.co.jp/gp/product/B0746MWWLC
Thermos Stainless King 16 Ounce Travel Mug with Handle, Cranberry $16.83 https://amzn.to/2Y4i8gS
Thermos 16-Ounce Drink Bottle, 16oz, Black $23.99 https://amzn.to/2Y0PehO
Thermos 16 Ounce Vacuum Insulated Stainless Steel Travel Tumbler $23.98 https://amzn.to/3kNr9ov
Thermos Blue Funtainer 12 Ounce Bottle $14.99 https://amzn.to/33YIvJ8
Thermos Sports Bottle with additional screw top and cup for hot liquids and carrying case 1L (33oz) サーモス 水筒 真空断熱2ウェイボトル 1.0L/1.03L ブラックペイント FHO-1001WF BK-PT ￥3,230 https://www.amazon.co.jp/dp/B07K6QB34M/
Thermos Sports Bottle Cold Only with carrying case 1L (33oz) サーモス 水筒 真空断熱スポーツボトル ブラックカモフラージュ 1.0L FHT-1000F BK-C ￥2,699 https://www.amazon.co.jp/dp/B07NGBDT4N/
Thermos at home tumbler with lid and base stainless steel 420ml【セット買い】サーモス 真空断熱タンブラー 420ml JDE-420 + フタ・ソコカバーブルー セット ￥2,259 https://www.amazon.co.jp/dp/B01M66YIVH/
Klean Kanteen Wide Insulated Bottle (coffee cap not included) 16oz $30.95 https://amzn.to/3kOQZIU
Thermos 160° screw top dark blue 250ml サーモス 水筒 真空断熱ケータイマグ 【スクリュータイプ】 250ml ダークネイビー JNO-252 DNVY ￥1,770 https://www.amazon.co.jp/dp/B07FNJC15N/
Thermos Bottle Washer ¥1,080 https://www.amazon.co.jp/dp/B01148A84Y/

Sources
For a relaxing time... https://www.youtube.com/watch?v=38UlEzCgxoQ
LA Times article https://www.latimes.com/archives/la-xpm-1989-06-16-fi-2174-story.html
Wirecutter https://www.nytimes.com/wirecutter/reviews/best-travel-mug/
www.thermos.com
www.thermos.jp
Vacuum flask https://en.wikipedia.org/wiki/Vacuum_flask
Thermos https://en.wikipedia.org/wiki/Thermos_LLC
Dewar James flask.jpg By Thomas Thorpe - Page 98 of History of Chemistry (book), Public Domain, https://commons.wikimedia.org/w/index.php?curid=3492753
Ri 2014 - Thermos flask - James Dewar (27).jpg By Vera de Kok - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=41691349
Dewar flask (exhibited at Deutsches Museum, Munich) By LepoRello - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8921556
Binchō-tan / white charcoal By STRONGlk7 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=19675839

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